Screen Equipment Aggregate Screening Plants For Sale. Used 2010 Model QA440 Crawer Mounted Mobile Screen Plant, S/N 1886SW10481, 6,000 to 7,000 hours use, with C-4 diesel engine, feed hopper with hydraulic reject grizzly, (2) each 5 X 10 Double Deck Incline Screens, rear fines discharge conveyor, two (2) fold out discharge conveyors for top and middle deck, on crawlers, Plant ...